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United States Patent | 5,007,114 |
Numano | April 16, 1991 |
A humidity-retaining mask includes a foldable mask body made of humidity-absorbing sheet material which is folded into a honeycomb structure when the mask is used. The mask body has a recessed portion on the upper side thereof to receive a user's nostril, and ear traps attached to the mask body.
Inventors: | Numano; Yasuhiko (Tokyo, JP) |
Assignee: | Japan Air Lines Co., Ltd. (Tokyo, JP) |
Appl. No.: | 371975 |
Filed: | June 27, 1989 |
Jul 14, 1988[JP] | 63-173762 | |
Apr 15, 1989[JP] | 1-94329 |
Current U.S. Class: | 2/206; 128/201.13; 128/204.17; D24/110.1 |
Intern'l Class: | A61M 016/00 |
Field of Search: | 128/201.13,204.17,206.12,206.16 2/206,9,173,205 |
2348108 | May., 1944 | Bulbulian | 128/201. |
3814094 | Jun., 1974 | De Angelis et al. | 128/201. |
3835853 | Sep., 1974 | Turner | 128/201. |
3982981 | Sep., 1976 | Takao et al. | 156/89. |
4136691 | Jan., 1979 | Ebeling et al. | 128/201. |
4150671 | Apr., 1979 | Tiger | 128/201. |
4157090 | Jun., 1979 | Phillips | 2/206. |
4196728 | Apr., 1980 | Granite | 128/201. |
4325365 | Apr., 1982 | Barbuto | 128/201. |
4327717 | May., 1982 | Oetjen et al. | 128/201. |
4458679 | Jul., 1984 | Ward | 128/201. |
4620537 | Nov., 1986 | Brown | 128/201. |
Foreign Patent Documents | |||
1364599 | May., 1964 | FR | 128/201. |
63-235192 | Sep., 1988 | JP | 128/201. |
0023279 | ., 1894 | GB | 128/201. |